Add hakunapi-tiles-servlet-jakarta, pre-encoded responses and collectionless mode

[jampukka]

Jakarta-RS implementation of the OGC API Tiles endpoints + additional /{tileMatrixSetId}/tilejson.json (as it's defacto needed by all clients). No tile source implements the tiles-core SPIs on main yet, so the module publishes nothing until one does; only the discovery path is tested here.

Key classes:

• TilesApiExtensionFactory / TilesApiExtension
  • Found through ServiceLoader, so being on the classpath is what enables it. Returns nothing when no tile layer is configured.
  • Contributes the tile operations, injectables and collection links through ApiExtension.
• TileResponse
  • Builds the tile response; hands already-gzipped tiles over as PreEncodedBytes / PreEncodedOutput instead of compressing them again.

Pre-encoded responses in hakunapi-simple-servlet-jakarta, key classes:

• PreEncodedBytes / PreEncodedOutput
  • Marks an entity whose bytes already carry their Content-Encoding. PreEncodedBytes has its length known up front (PreEncodedBytesWriter reports it, so no chunking).
• GzipInterceptor
  • Skips these entities rather than compressing them twice.
• GunzipInterceptor
  • Inflates them for a client that does not accept gzip. Deliberately the slow path; it exists for correctness.

Collectionless mode

• A service with no collections can start. HakunaContextListener claims the OGC API - Common classes always and the Features-specific ones only when collections exist.

  • This means hakunapi doesn't claim support to OGC API Features conformance classes

• GetCollectionQueryablesImpl becomes a DynamicPathOperation (like the items operations), so a collectionless service does not advertise /collections/{collectionId}/queryables.

• A missing collections property no longer fails startup (previously readCollectionIds() threw). A misspelled key now starts an empty service; the listener logs a warning when there are no collections and no extension published anything. ConfigTest warns as well.

• Accept-Encoding: gzip;q=0 is treated as not accepting gzip when deciding whether to inflate pre-encoded entities.